A qanat is a water management system used to secure reliable water supply to human settlements or irrigation in semi-arid and arid regions. Probably originating in Persia, the qanat system has been adopted and developed ...

An estimated 88% of Sumatran orangutan habitat is on land classiﬁed by Indonesian Government studies (RePPProT) as completely unsuitable for cultivation of major crops such as oil palm, rubber, robusta coffee or cocoa. O...